The shape memory effect and superelasticity in [001]-oriented NiFeGaCo single crystals in dependence on cobalt concentration E. E. Timofeeva, E. Yu. Panchenko, A. S. Eftifeeva [et al.]
Material type:
ArticleContent type: Текст Media type: электронный Subject(s): эффект памяти формы | сверхэластичность | монокристаллы | кобальт | мартенситные превращенияGenre/Form: статьи в журналах Online resources: Click here to access online
In:
AIP Conference Proceedings Vol. 2509. P. 020191-1-020191-4Abstract: In this work, the martensitic transformation (MT), shape memory effect (SME) and superelasticity (SE) on [001]-oriented single crystals of Ni44Fe19Ga27Co10, Ni39Fe19Ga27Co15 and Ni34Fe19Ga27Co20 (at %) alloys were investigated. The cobalt content determined any observation of thermal-induced thermoelastic B2-L10 MT and the level of minimum critical stresses necessary to form L10-martensite. Ni44Fe19Ga27Co10 single crystals demonstrated thermal-induced B2-L10 MT, low resistance of the B2-matrix to stress-induced B2-L10 MT, which was observed at 25 MPa, a wide SE temperature range from 263 to 473 K and narrow stress hysteresis of 20–50 MPa. An increase in the cobalt content to 15 at % led to the strain glass transition upon cooling and heating instead of B2-L10 MT and an increase in the critical stresses of L10-martensite formation up to 300 MPa. In Ni39Fe19Ga27Co15 single crystals SE was observed up to 350 K with a narrow stress hysteresis of 20–50 MPa. In Ni34Fe19Ga27Co20 single crystals, no thermal-induced or stress-induced MTs were found and in the temperature interval from 200 to 500 K only plastic deformation of the B2 phase occurred.
Библиогр.: 14 назв.
In this work, the martensitic transformation (MT), shape memory effect (SME) and superelasticity (SE) on [001]-oriented single crystals of Ni44Fe19Ga27Co10, Ni39Fe19Ga27Co15 and Ni34Fe19Ga27Co20 (at %) alloys were investigated. The cobalt content determined any observation of thermal-induced thermoelastic B2-L10 MT and the level of minimum critical stresses necessary to form L10-martensite. Ni44Fe19Ga27Co10 single crystals demonstrated thermal-induced B2-L10 MT, low resistance of the B2-matrix to stress-induced B2-L10 MT, which was observed at 25 MPa, a wide SE temperature range from 263 to 473 K and narrow stress hysteresis of 20–50 MPa. An increase in the cobalt content to 15 at % led to the strain glass transition upon cooling and heating instead of B2-L10 MT and an increase in the critical stresses of L10-martensite formation up to 300 MPa. In Ni39Fe19Ga27Co15 single crystals SE was observed up to 350 K with a narrow stress hysteresis of 20–50 MPa. In Ni34Fe19Ga27Co20 single crystals, no thermal-induced or stress-induced MTs were found and in the temperature interval from 200 to 500 K only plastic deformation of the B2 phase occurred.
There are no comments on this title.